Ménière's disease | |
---|---|
Other names | Ménière's syndrome, idiopathic endolymphatic hydrops [1] |
Diagram of the inner ear | |
Pronunciation | |
Specialty | Otolaryngology, Neurology |
Symptoms | Vertigo, tinnitus, hearing loss, fullness in the ear [3] [4] |
Usual onset | 40s–60s [3] |
Duration | 20 minutes to few hours per episode [5] |
Causes | Unknown [3] |
Risk factors | Family history [4] |
Diagnostic method | Based on symptoms, hearing test [3] |
Differential diagnosis | Vestibular migraine, transient ischemic attack [1] |
Treatment | Low-salt diet, diuretics, corticosteroids, counselling [3] [4] |
Prognosis | After ~10 years hearing loss and chronic ringing [5] |
Frequency | 0.3–1.9 per 1,000 [1] |
Ménière's disease (MD) is a disease of the inner ear that is characterized by potentially severe and incapacitating episodes of vertigo, tinnitus, hearing loss, and a feeling of fullness in the ear. [3] [4] Typically, only one ear is affected initially, but over time, both ears may become involved. [3] Episodes generally last from 20 minutes to a few hours. [5] The time between episodes varies. [3] The hearing loss and ringing in the ears can become constant over time. [4]
The cause of Ménière's disease is unclear, but likely involves both genetic and environmental factors. [1] [3] A number of theories exist for why it occurs, including constrictions in blood vessels, viral infections, and autoimmune reactions. [3] About 10% of cases run in families. [4] Symptoms are believed to occur as the result of increased fluid buildup in the labyrinth of the inner ear. [3] Diagnosis is based on the symptoms and a hearing test. [3] Other conditions that may produce similar symptoms include vestibular migraine and transient ischemic attack. [1]
No cure is known. [3] Attacks are often treated with medications to help with the nausea and anxiety. [4] Measures to prevent attacks are overall poorly supported by the evidence. [4] A low-salt diet, diuretics, and corticosteroids may be tried. [4] Physical therapy may help with balance and counselling may help with anxiety. [3] [4] Injections into the ear or surgery may also be tried if other measures are not effective, but are associated with risks. [3] [5] The use of tympanostomy tubes (ventilation tubes) to improve vertigo and hearing in people with Ménière's disease is not supported by definitive evidence. [5]
Ménière's disease was identified in the early 1800s by Prosper Menière. [5] It affects between 0.3 and 1.9 per 1,000 people. [1] The onset of Ménière's disease is usually around 40 to 60 years old. [3] [6] Females are more commonly affected than males. [1] After 5-15 years of symptoms, episodes that include dizziness or a sensation of spinning sometimes stop and the person is left with loss of balance, poor hearing in the affected ear, and ringing or other sounds in the affected ear or ears. [5]
Ménière's is characterized by recurrent episodes of vertigo, fluctuating hearing loss, and tinnitus; episodes may be preceded by a headache and a feeling of fullness in the ears. [4] People may also experience additional symptoms related to irregular reactions of the autonomic nervous system. These symptoms are not symptoms of Ménière's disease per se, but rather are side effects resulting from failure of the organ of hearing and balance, and include nausea, vomiting, and sweating, which are typically symptoms of vertigo, and not of Ménière's. [1] This includes a sensation of being pushed sharply to the floor from behind. [5] Sudden falls without loss of consciousness (drop attacks) may be experienced by some people. [1]
The cause of Ménière's disease is unclear, but likely involves both genetic and environmental factors. [1] [3] [7] A number of theories exist including constrictions in blood vessels, viral infections, and autoimmune reactions. [3]
The initial triggers of Ménière's disease are not fully understood, with a variety of potential inflammatory causes that lead to endolymphatic hydrops, a distension of the endolymphatic spaces in the inner ear. Endolymphatic hydrops (EH) is strongly associated with developing Ménière's disease, [1] but not everyone with EH develops Ménière's disease: "The relationship between endolymphatic hydrops and Meniere's disease is not a simple, ideal correlation." [8] Notably, mild EH can also occur in vestibular migraine which is an important differential diagnosis for Ménière's disease. [9]
Additionally, in fully developed Ménière's disease, the balance system (vestibular system) and the hearing system (cochlea) of the inner ear are affected, but some cases occur where EH affects only one of the two systems enough to cause symptoms. The corresponding subtypes of the disease are called vestibular Ménière's disease, showing symptoms of vertigo, and cochlear Ménière's disease, showing symptoms of hearing loss and tinnitus. [10] [11] [12] [13]
The mechanism of Ménière's disease is not fully explained by EH, but fully developed EH may mechanically and chemically interfere with the sensory cells for balance and hearing, which can lead to temporary dysfunction and even to death of the sensory cells, which in turn can cause the typical symptoms of MD – vertigo, hearing loss, and tinnitus. [8] [11]
An estimated 30% of people with Ménière's disease have Eustachian tube dysfunction. [14]
The diagnostic criteria as of 2015 define definite MD and probable MD as: [1] [4]
Definite
- Two or more spontaneous episodes of vertigo, each lasting 20 minutes to 12 hours
- Audiometrically documented low- to medium-frequency sensorineural hearing loss in the affected ear on at least one occasion before, during, or after one of the episodes of vertigo
- Fluctuating aural symptoms (hearing, tinnitus, or fullness) in the affected ear
- Not better accounted for by another vestibular diagnosis
Probable
- Two or more episodes of vertigo or dizziness, each lasting 20 minutes to 24 hours
- Fluctuating aural symptoms (hearing, tinnitus, or fullness) in the reported ear
- Not better accounted for by another vestibular diagnosis
A common and important symptom of MD is hypersensitivity to sounds. [16] This hypersensitivity is easily diagnosed by measuring the loudness discomfort levels (LDLs). [17]
Symptoms of MD overlap with migraine-associated vertigo (MAV) in many ways, but when hearing loss develops in MAV, it is usually in both ears, and this is rare in MD, and hearing loss generally does not progress in MAV as it does in MD. [1]
People who have had a transient ischemic attack (TIA) or stroke can present with symptoms similar to MD, and in people at risk magnetic resonance imaging should be conducted to exclude TIA or stroke. [1]
Other vestibular conditions that should be excluded include vestibular paroxysmia, recurrent unilateral vestibulopathy, vestibular schwannoma, or a tumor of the endolymphatic sac. [1]
No cure for Ménière's disease is known, but medications, diet, physical therapy, counseling, and some surgical approaches can be used to manage it. [4] More than 85% of patients with Ménière's disease get better from changes in lifestyle, medical treatment, or minimally invasive surgical procedures. Those procedures include intratympanic steroid therapy, intratympanic gentamicin therapy or endolymphatic sac surgery. [18]
During MD episodes, medications to reduce nausea are used, as are drugs to reduce the anxiety caused by vertigo. [4] [19] For longer-term treatment to stop progression, the evidence base is weak for all treatments. [4] Although a causal relation between allergy and Ménière's disease is uncertain, medication to control allergies may be helpful. [20] To assist with vertigo and balance problems, glycopyrrolate has been found to be a useful vestibular suppressant in patients with Ménière's disease. [21]
Diuretics, such as the thiazide-like diuretic chlortalidone, are widely used to manage MD on the theory that it reduces fluid buildup (pressure) in the ear. [22] Based on evidence from multiple but small clinical trials, diuretics appear to be useful for reducing the frequency of episodes of dizziness but do not seem to prevent hearing loss. [23] [24]
In cases where hearing loss and continuing severe episodes of vertigo occur, a chemical labyrinthectomy, in which a medication such as gentamicin is injected into the middle ear and kills parts of the vestibular apparatus, may be prescribed. [4] [25] [26] This treatment has the risk of worsening hearing loss. [25]
People with MD are often advised to reduce their sodium intake. [19] [27] Reducing salt intake, however, has not been well studied. [27] Based on the assumption that MD is similar in nature to a migraine, some advise eliminating "migraine triggers" such as caffeine, but the evidence for this is weak. [19] There is no high-quality evidence that changing diet by restricting salt, caffeine or alcohol improves symptoms. [28]
While use of physical therapy early after the onset of MD is probably not useful due to the fluctuating disease course, physical therapy to help retraining of the balance system appears to be useful to reduce both subjective and objective deficits in balance over the longer term. [4] [29]
The psychological distress caused by the vertigo and hearing loss may worsen the condition in some people. [30] Counseling may be useful to manage the distress, [4] as may education and relaxation techniques. [31]
If symptoms do not improve with less invasive approaches and for cases where the condition is uncontrolled or persistent and affecting both ears, surgery may be considered. [4] [19] [32]
Surgery to decompress the endolymphatic sac is one surgical approach that is sometimes suggested. Three methods of surgical endolymphatic sac decompression are sometimes suggested – simple decompression, insertion of a shunt, or removal of the sac. [33] There is some very weak evidence that all three methods may be useful for reducing dizziness, but that the level of evidence supporting these surgical procedures is low with further higher quality investigations being suggested. [33] There is a risk in these types of surgical procedures that the shunts used in these surgeries are at risk of becoming displaced or misplaced. [19] For those with severe cases who are eligible for endolymphatic sac decompression, a 2014 systematic review reported that in at least 75% of people, EL sac decompression was effective at controlling vertigo in the short term (>1 year of follow-up) and long term (>24 months). [34]
Surgical implantation of eustachian tubes (ventilation tubes) is not strongly supported by medical studies. There are some tentative evidence of benefit from tympanostomy tubes for improvement in the unsteadiness associated with the disease, [14] conclusions about how effective this surgery is and the potential for side effects and harms is not clear. [5] [32]
Destructive surgeries such as vestibular nerve labyrinthectomy are irreversible and involve removing entire functionality of most, if not all, of the affected ear; as of 2013, almost no evidence existed with which to judge whether these surgeries are effective. [35] The inner ear itself can be surgically removed via labyrinthectomy, although hearing is always completely lost in the affected ear with this operation. [35] The surgeon can also cut the nerve to the balance portion of the inner ear in a vestibular neurectomy. The hearing is often mostly preserved; however, the surgery involves cutting open into the lining of the brain, and a hospital stay of a few days for monitoring is required. [35]
Ménière's disease usually starts confined to one ear; it extends to both ears in about 30% of cases. [5] People may start out with only one symptom, but in Ménière's disease all three appear with time. [5] Hearing loss usually fluctuates in the beginning stages and becomes more permanent in later stages. Ménière's disease has a course of 5–15 years, and people generally end up with mild disequilibrium, tinnitus, and moderate hearing loss in one ear. [5] As of 2020, there has been no recent major breakthrough in the pathogenesis research of Ménière's disease. [45]
From 3 to 11% of diagnosed dizziness in neuro-otological clinics are due to Ménière's disease. [46] The annual incidence rate is estimated to be about 15 cases per 100,000 people and the prevalence rate is about 218 per 100,000, and around 15% of people with Ménière's disease are older than 65. [46] In around 9% of cases, a relative also had Ménière's disease, indicating a genetic predisposition in some cases. [4]
The odds of Ménière's disease are greater for people of white ethnicity, with severe obesity, and women. [1] Several conditions are often comorbid with Ménière's disease, including arthritis, psoriasis, gastroesophageal reflux disease, irritable bowel syndrome, and migraine. [1]
The condition is named after the French physician Prosper Menière, who in an 1861 article described the main symptoms and was the first to suggest a single disorder for all of the symptoms, in the combined organ of balance and hearing in the inner ear. [47] [48]
The American Academy of Otolaryngology –Head and Neck Surgery Committee on Hearing and Equilibrium set criteria for diagnosing MD, as well as defining two subcategories – cochlear (without vertigo) and vestibular (without deafness). [49]
In 1972, the academy defined criteria for diagnosing MD as: [49]
In 1985, this list changed to alter wording, such as changing "deafness" to "hearing loss associated with tinnitus, characteristically of low frequencies" and requiring more than one attack of vertigo to diagnose. [49] Finally in 1995, the list was again altered to allow for degrees of the disease: [49]
In 2015, the International Classification for Vestibular Disorders Committee of the Barany Society published consensus diagnostic criteria in collaboration with the American Academy of Otolaryngology–Head and Neck Surgery, the European Academy of Otology and Neurootology, the Japan Society for Equilibrium Research, and the Korean Balance Society. [1] [4]
Otorhinolaryngology is a surgical subspecialty within medicine that deals with the surgical and medical management of conditions of the head and neck. Doctors who specialize in this area are called otorhinolaryngologists, otolaryngologists, head and neck surgeons, or ENT surgeons or physicians. Patients seek treatment from an otorhinolaryngologist for diseases of the ear, nose, throat, base of the skull, head, and neck. These commonly include functional diseases that affect the senses and activities of eating, drinking, speaking, breathing, swallowing, and hearing. In addition, ENT surgery encompasses the surgical management of cancers and benign tumors and reconstruction of the head and neck as well as plastic surgery of the face, scalp, and neck.
Sinusitis, also known as rhinosinusitis, is an inflammation of the mucous membranes that line the sinuses resulting in symptoms that may include production of thick nasal mucus, nasal congestion, facial congestion, facial pain, facial pressure, loss of smell, or fever.
Prosper Menière was a French medical doctor who first identified that the inner ear could be the source of a condition combining vertigo, hearing loss and tinnitus, which is now known as Ménière's disease.
Tinnitus is a condition when a person hears a ringing sound or a different variety of sound when no corresponding external sound is present and other people cannot hear it. Nearly everyone experiences faint "normal tinnitus" in a completely quiet room; but this is of concern only if it is bothersome, interferes with normal hearing, or is associated with other problems. The word tinnitus comes from the Latin tinnire, "to ring". In some people, it interferes with concentration, and can be associated with anxiety and depression.
Otitis media is a group of inflammatory diseases of the middle ear. One of the two main types is acute otitis media (AOM), an infection of rapid onset that usually presents with ear pain. In young children this may result in pulling at the ear, increased crying, and poor sleep. Decreased eating and a fever may also be present. The other main type is otitis media with effusion (OME), typically not associated with symptoms, although occasionally a feeling of fullness is described; it is defined as the presence of non-infectious fluid in the middle ear which may persist for weeks or months often after an episode of acute otitis media. Chronic suppurative otitis media (CSOM) is middle ear inflammation that results in a perforated tympanic membrane with discharge from the ear for more than six weeks. It may be a complication of acute otitis media. Pain is rarely present. All three types of otitis media may be associated with hearing loss. If children with hearing loss due to OME do not learn sign language, it may affect their ability to learn.
Labyrinthitis is inflammation of the labyrinth, a maze of fluid-filled channels in the inner ear. Vestibular neuritis is inflammation of the vestibular nerve. Both conditions involve inflammation of the inner ear. Labyrinths that house the vestibular system sense changes in the head's position or the head's motion. Inflammation of these inner ear parts results in a vertigo and also possible hearing loss or tinnitus. It can occur as a single attack, a series of attacks, or a persistent condition that diminishes over three to six weeks. It may be associated with nausea, vomiting, and eye nystagmus.
Benign paroxysmal positional vertigo (BPPV) is a disorder arising from a problem in the inner ear. Symptoms are repeated, brief periods of vertigo with movement, characterized by a spinning sensation upon changes in the position of the head. This can occur with turning in bed or changing position. Each episode of vertigo typically lasts less than one minute. Nausea is commonly associated. BPPV is one of the most common causes of vertigo.
Hyperacusis is an increased sensitivity to sound and a low tolerance for environmental noise. Definitions of hyperacusis can vary significantly; it often revolves around damage to or dysfunction of the stapes bone, stapedius muscle or tensor tympani (eardrum). It is often categorized into four subtypes: loudness, pain, annoyance, and fear. It can be a highly debilitating hearing disorder.
Tinnitus retraining therapy (TRT) is a form of habituation therapy designed to help people who experience tinnitus—a ringing, buzzing, hissing, or other sound heard when no external sound source is present. Two key components of TRT directly follow from the neurophysiological model of tinnitus: Directive counseling aims to help the sufferer reclassify tinnitus to a category of neutral signals, and sound therapy weakens tinnitus-related neuronal activity.
Betahistine, sold under the brand name Serc among others, is an anti-vertigo medication. It is commonly prescribed for balance disorders or to alleviate vertigo symptoms. It was first registered in Europe in 1970 for the treatment of Ménière's disease, but current evidence does not support its efficacy in treating it.
Vertigo is a condition in which a person has the sensation that they are moving, or that objects around them are moving, when they are not. Often it feels like a spinning or swaying movement. It may be associated with nausea, vomiting, perspiration, or difficulties walking. It is typically worse when the head is moved. Vertigo is the most common type of dizziness.
A neurectomy, or nerve resection is a neurosurgical procedure in which a peripheral nerve is cut or removed to alleviate neuropathic pain or permanently disable some function of a nerve. The nerve is not intended to grow back. For chronic pain it may be an alternative to a failed nerve decompression when the target nerve has no motor function and numbness is acceptable. Neurectomies have also been used to permanently block autonomic function, and special sensory function not related to pain.
Endolymphatic hydrops is a disorder of the inner ear. It consists of an excessive build-up of the endolymph fluid, which fills the hearing and balance structures of the inner ear. Endolymph fluid, which is partly regulated by the endolymph sac, flows through the inner ear and is critical to the function of all sensory cells in the inner ear. In addition to water, endolymph fluid contains salts such as sodium, potassium, chloride and other electrolytes. If the inner ear is damaged by disease or injury, the volume and composition of the endolymph fluid can change, causing the symptoms of endolymphatic hydrops.
The semicircular canal dehiscence (SCD) is a category of rare neurotological diseases/disorders affecting the inner ears, which gathers the superior SCD, lateral SCD and posterior SCD. These SCDs induce SCD syndromes (SCDSs), which define specific sets of hearing and balance symptoms. This entry mainly deals with the superior SCDS.
The Epley maneuver or repositioning maneuver is a maneuver used by medical professionals to treat one common cause of vertigo, benign paroxysmal positional vertigo (BPPV) of the posterior or anterior canals of the ear. The maneuver works by allowing free-floating particles, displaced otoconia, from the affected semicircular canal to be relocated by using gravity, back into the utricle, where they can no longer stimulate the cupula, therefore relieving the patient of bothersome vertigo. The maneuver was developed by the physician John M. Epley, and was first described in 1980.
Vestibular migraine (VM) is vertigo with migraine, either as a symptom of migraine or as a related neurological disorder.
An endolymphatic sac tumor (ELST) is a very uncommon papillary epithelial neoplasm arising within the endolymphatic sac or endolymphatic duct. This tumor shows a very high association with Von Hippel–Lindau syndrome (VHL).
Migraine may be treated either prophylactically (preventive) or abortively (rescue) for acute attacks. Migraine is a complex condition; there are various preventive treatments which disrupt different links in the chain of events that occur during a migraine attack. Rescue treatments also target and disrupt different processes occurring during migraine.
A labyrinthectomy is a procedure used to decrease the function of the labyrinth of the inner ear. This can be done surgically or chemically. It may be done to treat Ménière's disease.
Cochlear hydrops is a condition of the inner ear involving a pathological increase of fluid affecting the cochlea. This results in swelling that can lead to hearing loss or changes in hearing perception. It is a form of endolymphatic hydrops and related to Ménière's disease. Cochlear hydrops refers to a case of inner-ear hydrops that only involves auditory symptoms and does not cause vestibular issues.
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